Rails 4 find_by是否已弃用? [英] Is rails 4 find_by deprecated?
问题描述
我听说find_by已过时,这是真的吗?我一直在考虑其他选择,例如为每个查找
创建一个不同的方法,例如:
I heard that find_by is deprecated is this true? I have been thinking of alternatives such as creating for each find
a different method, e.g.:
之前:> p>
before:
Model.find_by_username 'username'
之后:
-在模型中---
after: --in model---
class << self
def by_username username
where(:username => username).first
end
end
这是一个好名字吗?
推荐答案
根据路轨4发行说明:
所有 dynamic 方法,但find_by _...和find_by _...除外。 !已弃用。
All dynamic methods except for find_by_... and find_by_...! are deprecated.
find_by
不是动态方法,因此 和 find_by _...
& find_by _...!
是动态的,但如上所述仍未弃用。
find_by
is not a dynamic method and therefore it's NOT DEPRECATED, and find_by_...
& find_by_...!
are dynamic, but still not deprecated as mentioned above.
因此,您仍然可以使用Active Record提供的原始方法,而不必定义自己的方法:
So that means you still can use the original methods provided by Active Record without having to define your own:
Model.find_by_username(:username)
Model.find_by(username: 'value', age: 24)
如果您想要真正不推荐使用的查找器方法的功能,则可以包括将其移入的宝石: activerecord -deprecated_finders 。或遵循Rails 4发行说明中所述:
If you want the functionality of the really deprecated finder methods you can either include the gem that they were moved into: activerecord-deprecated_finders. Or follow what the Rails 4 Release Notes say:
这里是您重写代码的方式:
Here's how you can rewrite the code:
- find_all_by _...可以使用where(...)重写。
- find_last_by _...可以使用where(..重写。 。)。last。
- scoped_by _...可以使用where(...)进行重写。
- find_or_initialize_by _...可以使用进行重写find_or_initialize_by(...)。
- find_or_create_by _...可以使用find_or_create_by(...)重写。
- find_or_create_by _... !!可以使用find_or_create_by!(...)进行重写。
- find_all_by_... can be rewritten using where(...).
- find_last_by_... can be rewritten using where(...).last.
- scoped_by_... can be rewritten using where(...).
- find_or_initialize_by_... can be rewritten using find_or_initialize_by(...).
- find_or_create_by_... can be rewritten using find_or_create_by(...).
- find_or_create_by_...! can be rewritten using find_or_create_by!(...).
这篇关于Rails 4 find_by是否已弃用?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!